Digital Image Watermarking Method Based on Geometric Moment Invariants

Abstract

In this paper, we present a novel technique for digital watermarking images based on geometric moment invariants.In image watermarking, geometric transformation is the most challenging problem in all kinds of attacks.Embedding the watermark into the normalized image is an idea of this kind of algorithms.However, because the sizes of the normalized original image and the normalized geometrically attacked image are different known, and also the synchronization of the embedding and the extracting are very different to be achieved.In order to solve this problem, we propose an image watermarking based on geometric moment invariants.Watermark is composed of the mean values of eleven geometric invariant moments to translation, scaling and rotation.Watermark detection is as simple as computing the moment invariants of the received image.The experiment results demonstrate the proposed method can obtain better visual effect, meanwhile, it is also robust enough to some image degradation processing.